<!DOCTYPE html>
<html ng-app=''>
  <head>
    <meta charset="utf-8">
    <title></title>
    <script src="angular.js"></script>
  </head>
  <body ng-init='a=0;b=0'>
    <input type="text" name="" value="" ng-model='a'>
    <input type="text" name="" value="" ng-model='b'>
    <span>{{a*b}}</span>
  </body>
</html>
